Access to a Few Hundred Thousand Doses Could Be Possible By the Middle of Next Year

ZURICH—Plans for the first efficacy trials of Ebola vaccines in West Africa have been moved up one month to December, a World Health Organization official said Friday, and access to a few hundred thousand doses could be possible by the middle of next year.

During a briefing with reporters in Geneva, Dr. Marie-Paule Kieny, an assistant director-general for the health agency, said two possible Ebola vaccines are ready for clinical...